Sentences with phrase «periods of warm climate»

Not exact matches

At the beginning of a strenuous exercise program or after traveling to a warmer climate, the intensity and duration of exercise should be limited initially and then gradually increased during a period of 10 to 14 days to accomplish acclimatization to the heat.

However, the recent period of cooling does suggest that either manmade global warming may be smaller or that the impact of other factors may be greater than climate models have so far assumed.

The White House approved a report that found the earth is experiencing the warmest period in the history of civilization and humans are to blame, despite the fact that it directly contradicts much of the Trump administration's position on climate change.

Notably, the rise and expansion of both the Indus Valley civilization (from about 5350 years to about 4600 years ago) and the Vedic civilization (from about 3450 years to about 3100 years ago) occurred during periods when climate was relatively warm, wet, and stable.

Researchers from the Niels Bohr Institute have analysed the natural climate variations over the last 12,000 years, during which we have had a warm interglacial period and they have looked back 5 million years to see the major features of the Earth's climate.

New research could explain why the Arctic was much warmer during a period millions of years ago that scientists say most closely resembles Earth's climate today

A Swiss - led group using tree - ring data to look at Central European summer climate patterns during roughly 2,500 years saw that periods of prolonged warming and of colder than usual spells coincided with social upheavals.

«Using a numerical climate model we found that sulfate reductions over Europe between 1980 and 2005 could explain a significant fraction of the amplified warming in the Arctic region during that period due to changes in long - range transport, atmospheric winds and ocean currents.

It is also the longest period of globally stable climate and sea level in at least the last 400,000 most recent years of seesaw between glaciation and warmer times.

If climate change gets catastrophic — and the world sees more than 6 degrees Celsius warming of average temperatures — the planet will have left the current geologic period, known as the Quaternary and a distant successor to the Ordovician, and have returned to temperatures last seen in the Paleogene period more than 30 million years ago.

The study was based on reconstructions and climate modelling of a period of global warming 56 million years ago.

Assistant professor Kathrin Rousk, Department of Biology, explains, «to aid in predicting the role of moss - associated N2 fixation in a warmer, future climate, we quantified N2 fixation throughout the snow - free period in subarctic tundra.

The period known as the Palaeocene - Eocene Thermal Maximum (PETM) was triggered by massive releases of carbon into the atmosphere and climate researchers have long identified it as a time that could in some ways be analogous to today's global warming.

The Holocene Climate Optimum was a period of global climate warming that occurred between six to nine thousand yeaClimate Optimum was a period of global climate warming that occurred between six to nine thousand yeaclimate warming that occurred between six to nine thousand years ago.

The period of intense climate warming, related to the emplacement of large amounts of basalt of the Siberian Traps and which we previously thought was responsible for the extinction of marine species, in fact happened 500,000 years after the Permian - Triassic boundary.

«During last warming period, Antarctica heated up two to three times more than planet average: Amplification of warming at poles consistent with today's climate change models.»

But Robeson said the observation aligns with theories about climate change, which hold that amplified warming in the Arctic region produces changes in the jet stream, which can result in extended periods of cold weather at some locations in the mid-northern latitudes.

Understanding the complex interplay between climate and biotic interactions is thus essential for fully anticipating how ecosystems will respond to the fast rates of current warming, which are unprecedented since the end of the last glacial period.

Short - lived climate pollutants are so called because even though they warm the planet more efficiently than carbon dioxide, they only remain in the atmosphere for a period of weeks to roughly a decade whereas carbon dioxide molecules remain in the atmosphere for a century or more.

Polar bears are likely to have survived periods of warming before, but Axel Janke at the Biodiversity and Climate Research Centre in Frankfurt, Germany, points out that this time the warming is more rapid and is happening in tandem with human - driven habitat destruction, illegal hunting and pollution.

Closer to the poles the emergence of climate change in the temperature record appeared later but by the period 1980 - 2000 the temperature record in most regions of the world were showing clear global warming signals.

Climate scientists, however, are only too aware of the problems (see Climate myths: It was warmer during the Medieval period), and the uncertainties were both highlighted by Mann's original paper and by others at the time it was published.

When he lined up their ages with global climate records, he noticed a pattern: Many species of megafauna seemed to disappear during a period of extreme warming around 12,300 years ago, Cooper and his team write today in Science Advances.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

They said that two extreme climate periods — the Medieval Warming Period between 800 and 1300 and the Little Ice Age of 1300 to 1900 — occurred worldwide, at a time before industrial emissions of greenhouse gases became abundant.

They concluded in the January Climate Research that «across the world, many records reveal that the 20th century is probably not the warmest nor a uniquely extreme climate period of the last millennium.Climate Research that «across the world, many records reveal that the 20th century is probably not the warmest nor a uniquely extreme climate period of the last millennium.climate period of the last millennium.»

These remains confirm that the deposits date to a warm period of climate around 420,000 years ago, the so - called Hoxnian interglacial, when the climate was probably slightly warmer than the present day.

But the period of time over which the team analysed the long - term trend in warming was the past 50 years, in which this oscillation hasn't changed significantly — so almost all the warming looks to have been the result of anthropogenic climate change.

The strait also allowed mammals to leave Alaska for greener pastures when prolonged periods of warmer, wetter climate allowed peat to spread, which cooled the ground and discouraged the grass, sedges and rushes from growing.

Earth's climate naturally varies between times of warming and periods of extreme cooling (ice ages) over thousands of years.

The research, published in Nature Communications, examined preserved fossil remains of coccolithophores from a period of climate warming and ocean acidification that occurred around 56 million years ago — the Paleocene Eocene Thermal Maximum (PETM)-- and provides a much - needed long - term perspective of coccolithophore response to ocean acidification.

By studying the relationship between CO2 levels and climate change during a warmer period in Earth's history, the scientists have been able to estimate how the climate will respond to increasing levels of carbon dioxide, a parameter known as «climate sensitivity».

«Currently, our planet is in a warm phase — an interglacial period — and the associated increased climate sensitivity needs to be taken into account for future projections of warming induced by human activities.»

Professor Eelco Rohling of The Australian National University in Canberra says: «We find that climate change in response to CO2 change in the warmer period was around half that of the colder period.

Peter Stott, the head of climate monitoring at the U.K. Met Office, agreed, noting in an email that, «The slowdown hasn't gone away, however, the results of this study still show the warming trend over the past 15 years has been slower than previous 15 year periods.

Thus, factors shaping the climate during the relatively warm period of the Late Pleistocene are probably doing much the same today.

U.S. Data Since 1895 Fail To Show Warming Trend LINK WASHINGTON, Jan. 25 — After examining climate data extending back nearly 100 years, a team of Government scientists has concluded that there has been no significant change in average temperatures or rainfall in the United States over that entire period.

See the RealClimate discussions of the Little Ice Age and Medieval Warm Period for explanations of why both the Viking colonization of Greenland and the freezing of the River Thames actually tells us relatively little about past climate change.

Studies such as Otto et al. (2012) display how the numerical scale of the simulation numbers allows for clear separation between a climate with lower level of heat - trapping gases (1960s) and the recent period (2000s), such that the 2010 heat wave in western Russia was more likely to occur with the additional warming due to climate change (Figure 3).

«The climate reconstructions for the past 2,000 years have led to a simplistic picture of a Medieval Warm Period and a Little Ice Age.

The simple question of whether the medieval period was warm or cold is not particularly interesting — given the uncertainty in the forcings (solar and volcanic) and climate sensitivity, any conceivable temperature anomaly (which remember is being measured in tenths of a degree) is unlikely to constrain anything.

Second, because the 1900 - 1950 TSI value was lower than the 1950 - 2000 TSI value, this would induce by alone a solar induced climate warming of the atmosphere during 1950 - 2000 even if during the period 1950 - 2000 the sun was perfectly constant.

The study noted that the same climate models the UN IPCC uses can only «explain only about half of the heating that occurred during a well - documented period of rapid global warming in Earth's ancient past.»

«The study found that climate models explain only about half of the heating that occurred during a well - documented period of rapid global warming in Earth's ancient past.

The State of the Climate November 2015 report noted that in order for 2015 to not become the warmest year in the 136 - year period of record, the December global temperature would have to be at least 0.81 °C (1.46 °F) below the 20th century average — or 0.24 °C (0.43 °F) colder than the current record low December temperature of 1916.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

Beetle activity is also strongly tied to climate, and warmer temperatures speed up reproduction times, extend growth periods, and increase probability of beetle survival (Mitton and Ferrenberg 2012; Bentz and Jönsson 2015; Bentz et al. 2016).

Two examples of climate extremes include periods of intense warm or cool temperatures and significant wet or dry spells across seasons.

Although climate patterns in the future may not exactly mimic those conditions, the period of warming allowed Petrenko to reveal an important piece of the climate puzzle: natural methane emissions from ancient carbon reservoirs are smaller than researchers previously thought.

In the paper Gray makes many extravagant claims about how supposed changes in the THC accounted for various 20th century climate changes («I judge our present global ocean circulation conditions to be similar to that of the period of the early 1940s when the globe had shown great warming since 1910, and there was concern as to whether this 1910 - 1940 global warming would continue.